Week 4 Tissues

Question 1

What are the 4 tissue types?

Answer 1

1. Epithelial,
2. Connective,
3. Muscle,
4. Nerve.

Question 2

How do we classify epithelial tissue?

Answer 2

By cell shape & number of cell layers.

Question 3

Name & describe the different epithelial cell shapes?

Answer 3

1. Squamous - Thin & flat.
2. Cuboidal - Box shaped.
3. Columnar - Tall rectangular.

Question 4

Give a defintion & an example of Stratified & simple epithelia?

Answer 4

1. Stratified - More than 1 layer of cells over the base e.g. skin which is statified squamous cells.
2. Simple - One layer of cells on the base e.g. alveoli which is simple squamous.

Question 5

What are the functions of epithelial tissue (a clue - P, P, S, S)

Answer 5

• P = Protection,
• P = Permeable,
• S = Sensation,
• S = Special Secretory

Question 6

Epithelial cells attach toether in 3 different ways/junctions, what are they & give an example of where they appear?

Answer 6

1. Tight e.g. bladder,
2. Anchoring e.g. skin,
3. Gap e.g. heart

Question 7

Epithelial tissue makes up gland but what 2 types of glands are there & what do they do?

Answer 7

1. Endocrine - secrete into the interstitial fluid e.g. hormones.
2. Exocrine - secrete into ducts that open onto epithelial surfaces e.g. enzymes, like sweat glands, tear ducts.

Question 8

What is the prupose of connective tissue?

Answer 8

To bind structures together & form a framewor of support.

Question 9

What are the basic componenets of connective tissue?

Answer 9

1. Specialist cells,
2. Extra cellular protein fibres,
3. Ground substance.

Question 10

What makes up the matrix of connective tissue?

Answer 10

Cellular fibres + fluid

Question 11

What specialist cells are always present in connective tissue?

Answer 11

Fibroblasts.

Question 12

What are the 3 types of protein finbres found in connective tissue?

Answer 12

1. Collogen,
2. Elastic,
3. Reticular

Question 13

What decides the what type of connetive tissue it may be & what 3 types exist?

Answer 13

The matrix

1. Connective tissue proper (soft matrix),
2. Fuid connective tissue (fuid matrix),
3. Supportive connective tissue (solid matrix).

Question 14

Give an example of connective tissue proper, fluid & supportive.

Answer 14

Loose or dense, blood or lymph, cartilage or bone.

Question 15

Cartilage is an example of supportive connective tissue, but what are the different types?

Answer 15

1. Hyaline,
2. Elastic,
3. Fibrocartilage.

Question 16

Give a definition of a membrane.

Answer 16

A structure formed from epithelial cells supported by connective tissue.

Question 17

What are the 4 types of membranes & give an example of where they exist?

Answer 17

1. Mucous - mouth & nose,
2. Serous - pleura of lungs
3. Synovial - joints,
4. Cutaneous - skin

Question 18

The skin is a complex layer of epithelium in 5 layers. What are the layers?

Answer 18

1. Stratum basale (germinativum),
2. Stratum spinosum,
3. Stratum granulosum,
4. Stratum lucidum,
5. Stratum corneum.

Question 19

What are the 2 types of skin cancer?

Answer 19

1. Basal cell carcinoma,
2. Malignant melanoma.

Question 20

Expand on the A-E detection system of cancer.

Answer 20

A = Asymetry

B = Border

C = Colour

D = Diameter

E = Evaluation